package jdbc;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Scanner;
//public class LoginDemo {
//    public static void main(String[] args) {
//        System.out.println("欢迎来到登录界面");
//        Scanner scanner = new Scanner(System.in);
//        System.out.println("请输入用户名:");
//        String username = scanner.nextLine();
//        System.out.println("请输入密码:");
//        String password = scanner.nextLine();
//        try(Connection connection= DBUtil.getConnection()) {
//            Statement statement = connection.createStatement();
//            String  sql = "SELECT id,username,password,nickname,age " +
//                          "FROM user " +
//                          "WHERE username='"+username+"'AND password='"+password+"'";
//            ResultSet rs=statement.executeQuery(sql);
//            if(rs.next()){
//                System.out.println("登录成功！");
//            }else{
//                System.out.println("登录失败！");
//            }
//        } catch (SQLException e) {
//            e.printStackTrace();
//        }
//    }
//}

public class LoginDemo {
    public static void main(String[] args) {
        System.out.println("欢迎登录");
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入用户名:");
        String username = scanner.nextLine();
        System.out.println("请输入密码:");
        String password = scanner.nextLine();

        try (Connection connection = DBUtil.getConnection();){
            Statement statement = connection.createStatement();
            String sql = "SELECT id,username,password,nickname,age " +
                    "FROM user " +
                    "WHERE username='"+username+"' AND password='"+password+"'";
            ResultSet rs = statement.executeQuery(sql);
            if(rs.next()){
                System.out.println("登录成功!");
            }else{
                System.out.println("登录失败!");
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}
